Laserfiche WebLink
CONCLUSIONS <br />Striped bass (Morone saxatilis) in Lake Powell evidently underwent a <br />spawning migration to the Colorado River inlet during the spring of 1980. <br />The distance of upstream movement by striped bass in the river is unknown; <br />however, the capture of spent adults and a few eggs suggests that spawning <br />occurred at or above Gypsum Canyon at river mile 198 (198 miabove Lees Ferry). <br />No bass were captured above the rapids in Cataract Canyon (river mile 213) <br />but the data are inconclusive inasmuch as sampling effort there lasted only <br />two weeks. Cool water temperatures from snow melt in the watershed appeared <br />to be a more logical explanation for lack of movement up the river rather than <br />presence of the rapids. Stomachs of most spawning and pre-spawning striped <br />bass examined did not contain food. Fish remains in stomachs containing food <br />were of non-native species. Degree of feeding after spawning was not deter- <br />mined because sampling was terminated before many spent fish were captured. <br />Adult and juvenile Colorado squawfish were also captured in the area <br />near Gypsum Canyon where striped bass were sampled. The number of squawfish <br />captured suggests that either a seasonal migration of this species occurs in <br />the reservoir or that the reservoir population is larger than previously <br />considered.